JP3382295B2 - Image stabilization device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION 1. Field of the Invention
To correct image blur caused by vibration applied to the imaging optical system
In particular, the imaging optical system has a small size.
At least one of the zoom optical group and the focusing optical group
And a plurality of image blur correction coefficients corresponding to the movement of the optical group.
For improving the image blur correction device provided with the storage means for storing the
Is what you do. [0002] 2. Description of the Related Art Conventionally, a camera has been used for image blur correction.
Various devices have been proposed. As an example, the present application
Japanese Patent Laid-Open No. 4-20941 has been proposed by a person. this
The apparatus of the proposed embodiment is an image stabilizing optical system for a zoom lens or the like.
In the case of incorporating the mechanism, the image by zooming etc.
The drive amount coefficient of the shake correction optical mechanism,
Performs image stabilization by correcting the amount of change, and covers the entire zoom area
Therefore, it is intended to obtain a good image blur correction effect. So
Then, as a correction method for the change in the image stabilization sensitivity, (A) Analyzing the position of the zoom lens and focus lens
Readings as the amount of vibration
Then, the driving amount of the image blur correction optical mechanism is corrected. (B) Zoom lens and focus lens
Divides the position into a finite number of areas, and supports image stabilization corresponding to each area
The value of the sensitivity is calculated by a microcomputer
The value stored in ROM), so-called lookup
Read from the table and use this value to
A correction is made to the driving amount of the mechanism. Are disclosed. [0004] However, the above-mentioned problem is not solved.
Each of the two correction methods has the following problems.
I was [0005] The vibration isolation sensitivity of the above (A) is calculated from the analog value.
In the embodiment of calculating, 1) Computation functions are complicated and often cannot be represented by simple expressions.
No. 2) Position of zoom lens and focus lens
The analog position detector that detects the position is accurate (linear)
Those that are excellent in resolution and environmental reliability are expensive. This is not a general problem. Therefore, for general use
In the photographing device of (1), the ROM of the microcomputer (B) is used.
Use lookup table reference method stored in
Things are common. However, this method also has the following problems.
Have a point. That is, in this system,
Sensitivity accuracy is in the area of the zoom zone and focus zone
It is almost determined by the number of divisions.
Therefore, a) The most commonly used gray code patterns and
Detection of zoom and focus zones composed of brushes
The vessel becomes larger. B) The pattern of the detector and the position of the brush
Strict positioning accuracy is required depending on the number of divisions
It is. C) The storage amount of the look-up table is increased.
Then, an expensive microcomputer is required. Problem occurs
Therefore, the number of divisions cannot be increased without limit. I
Therefore, the upper limit of the number of divisions in an actual product is “16 (4
bit) "or" 32 (5 bit) "
Value. Therefore, if the zoom zone division number is "1"
6 ”, the rate of change of the image stabilization sensitivity due to zooming (maximum value and
Assuming that the ratio of the minimum value is “2.0”, the anti-vibration sensitivity
Error of 2^1/16= 1.044 Thus, an error of 4.4% occurs at the maximum. this
The error amount is an amount that does not cause much problem during normal image blur correction.
Yes, but anti-vibration sensitive during zooming and focusing
When the selected value of the degree table is changed, the image stabilization optical
The mechanism is very small, but moves suddenly, and the image moves suddenly with it
This phenomenon occurs. Therefore, this image blur correction device is used as a still camera.
When the image is applied to the camera, the exposure is
If done, the photograph will be shaken greatly. In addition, the camera has an autofocus (hereinafter referred to as autofocus).
(Hereinafter, referred to as AF).
If the movement of the image occurs during image storage,
Image is shaken, the contrast of the image is significantly reduced, and AF
Affects accuracy. Further, the image blur correction optical mechanism moves rapidly.
At that moment, the actuator of the mechanism consumes large power
At this time, other actuators of the camera, such as
In this case, simultaneous driving with the stepping motor
Then, a problem of step-out of the stepping motor also occurs.
This operation occurs due to insufficient power supply to the camera control circuit.
There is also a risk. [0014] [0015] [0016](Object of the invention)  The present inventionEyesThe target is variable magnification
Caused by the movement of the focusing optics and focusing optics
Alleviate image blur errors and always perform good image blur correction
To provide an image stabilization deviceWhat to tryso
is there. [0017] [Means for Solving the Problems]To achieve the above purpose
For the bookThe invention isAt least for zooming optics and focusing
An imaging optical system having any one of the optical groups, and the imaging optical system
Position detecting means for detecting the position of the optical group
Set the image blur correction coefficient according to the output state of the detection means
Setting means for decentering or tilting the optical axis of the imaging optical system;
Image blur correction optical mechanism and vibration applied to the imaging optical system
Vibration detection means for detecting
Based on the image blur correction coefficient set by the setting means.
An image for which the image blur correction is performed by driving the image blur correction optical mechanism.
With image stabilization meansEquipmentThe image blur correction device obtained,
Depending on the position of the optical group of the imaging optical system, a plurality of
Storage means for storing scattered image blur correction coefficients;
A first image blur correction coefficient stored in a row and the first image blur
A third value between the correction coefficient and the adjacent second image blur correction coefficient.
The image blur correction coefficient is calculated by performing a predetermined calculation.
A calculating circuit, wherein the setting unit is configured to correct the image blur
A second image blur correction from the first image blur correction coefficient
When shifting to the coefficient, it is calculated by the calculation circuit.
The obtained third image blur correction coefficient is referred to as the image blur correction coefficient.
The image blur correction device is set as follows. [0018] [0019] [0020] [0021] 【Example】 Before describing embodiments of the present invention,
An example will be described. FIGS. 1 to 8 show the present invention.First reference pertaining to
Show technical examplesFIG.This first participant
Technical examplesThe imaging optics used in
You. The imaging optical system has a focal length of 100 mm to 3 mm.
This is a 3x zoom of 00mm.
(F = 100mm), below is telephoto end (f = 300mm)
3 shows the arrangement of the lenses. This imaging optical system is composed of four groups,
The fourth group is fixed and the first, second and third groups move
In addition, the first lens unit moves during focusing. And
The second group (the shake correction optical system) is changed in the direction perpendicular to the optical axis.
Position, the image on the image plane is displaced
Do the positive. Next, the principle of image blur correction will be described.
You. The focal length of the image forming optical system is f, and the photographing magnification is β.
Then, the imaging optical system sets θ [rad] about the front principal point.
Of image displacement d when angular vibration of_IMIs     d_IM= F (1 + β) · θ (1) Becomes On the other hand, the second group of the shake correction optical system shown in FIG.
Lens displacement d_L Displacement d of the image with respect to_IMEccentric sensitive ratio
Degree S_d If you call it     d_IM= S_d ・ D_L                                   …………… (2) Becomes And the eccentric sensitivity S_d Is the focal length f and the shooting magnification
Because it is a function of β     S_d = S_d (F, β) …………… (3) Can be expressed as The principle of image blur correction is the angle of the imaging optical system.
The image shake (Equation (1)) due to the degree shake is converted to the image change due to the lens displacement.
(1) = (2) and (1)
Using the equation of (3)     d_L = (D_IM/ S_d ) = {F ・ (1 + β) ・ θ｝ / ｛S_d (F, β)｝                                                       ………………(Four) Lens displacement d calculated by_L Image stabilization optics according to
What is necessary is just to drive a system. That is, the output θ of the shake detection sensor and the image formation
Optical system parameters f, β and eccentric sensitivity S_d More formula
The lens displacement d according to (4)_L , And the second group of FIG.
Is the displacement d_L Eccentric drive according to
Corrections can be made. By the way, in the above equation (4), the lens displacement
Quantity d_L To calculate f, β, S_d The three paras
Since a meter is required, the parameter
Data,       k = k (f, β) = f (1 + β) / S_d (1 + β) ............ (5) Equation (4) gives       d_L = K (f, β) · θ (6) And the lens displacement d_L The parameters for the calculation of
“K (f, β)” is one. That is, the image blur correction device
The zoom lens and / or focus lens
According to the position of “S” in the ROM or the like._d (F, β) "
"K (f, β)" stored in the memory
Lens displacement d with θ detected by the detection sensor_L Calculate
Just do it. [0029]In the first reference technology example, Anti-vibration
It is assumed that image blur correction is performed using the sensitivity k (f, β).
You. Next,the aboveMore about vibration isolation sensitivity k
explain. The image stabilization sensitivity k is determined by the focal length f and the photographing magnification β.
Is the function k (f, β) of
However, k (f, β) is more focused than the rate of change due to the imaging magnification β.
Since the rate of change with distance f is greater,
The effect of FIG. 3 shows that the subject distance is infinite (β = 0).
Of the focal length f and the image stabilization sensitivity k (f, β = 0)
FIG. 6 is a diagram showing the relationship, where a true value k (f, β) is a wide-angle end;
From the value k (100,0) to the telephoto end value k (300,0)
Up to this point, it changes non-linearly but continuously as shown in the figure. On the other hand, an encoder for detecting a zoom position, which will be described later,
The camera takes 16 minutes to cover the entire zoom range from the wide end to the tele end.
It is configured to divide and detect the position. Soshi
The anti-vibration sensitivity in these zoom zones 0 to 15
The degree setting value is set to K (Z, 0) in FIG.
Six K (Z, 0) data are used for image blur correction
Stored as a lookup table in the ROM of the ICPU
Have been. In addition, prevention according to the position of the focus lens
The vibration sensitivity is set similarly. That is, the vibration isolation sensitivity K
(Z, B) is for zoom zone Z and focus zone B.
This is configured as a two-dimensional matrixExampleThen Zoo
The number of focus zones is divided into 16 and the number of focus zones is divided into 4.
Are stored in the ROM.
Is stored. FIG. 4 is a graph showing the sensitivity of the anti-vibration sensitivity K (Z, B).
FIG. Next, an image blur correction operation during zooming will be described.
Will be described. FIG. 5 shows zooming while performing image blur correction.
FIG. 7 is a diagram for explaining an image blur correction operation when
In FIGS. 5A to 5D, the horizontal axis represents time t.
ing. FIG. 5A shows the camera shake angular displacement, and FIG.
FIG. 5B shows the change in the image stabilization sensitivity, and FIG.
Fig. 5 (d) shows the control displacement of the scientific system, and the image blur after image blur correction.
The correction error, that is, the image blur displacement
You. First, the camera shake waveform is set to a steady state as shown in FIG.
Into a typical sinusoidal vibration. This kind of camera shake
Zooming from the wide side to the tele side while
Operation shall be performed. Then, the true value k of the anti-vibration sensitivity
(F, β) is k in FIG. 5B according to the change in the focal length f.
It continuously increases like (f, β). But the zoom amount
Encoder is switched in stages during zooming.
So, it is read from the ROM lookup table
The vibration isolation sensitivity data is as shown for K (Z, B) in FIG.
Time t₁ , T_Two , T_Three Is switched step by step. FIG. 5 (c) shows a shake correction optical system as described above.
And the movement of_L Is the lens
Ideal drive trajectory, D shown by solid line_L Is the actual driving trajectory
It is. Ideal displacement d of the lens_L Is the expression as described above
Using (6)       d_L = K (f, β) · θ (7) It is represented by Therefore, d indicated by a broken line_L Of FIG. 5 (a)
From the camera shake angle θ and the image stabilization sensitivity k (f, β) in FIG.
It is calculated. However, in reality, as described above,
Is discrete data like K (Z, B) in Fig.5 (b)
Can not be obtained, it is calculated using this K (Z, B)
Lens displacement D_L Is       D_L = K (Z, B) · θ ... (8) This value is represented by a solid line D in FIG._L become. Here, as described above, the anti-vibration sensitivity K (Z,
B) is time t₁ , T_Two , T_Three To switch step by step
The lens displacement D_L Also time t₁ , T_Two , T_Three Suddenly
change. However, time t₁ In, the camera shake angular displacement is just
Since "0", that is, the origin, the lens displacement amount is
At "0", time t_Two , T_Three The rapid movement like the time of
Is peeling. Next, the image blur displacement δ after the image blur correction,
The image blur correction error will be described. In order to accurately perform image blur correction, it is necessary to correct
The positive optical system has a lens displacement d indicated by a broken line in FIG._L To
It has been explained earlier that the driving is required. And the lens
Displacement (movement) d of the image due to the drive of_IMIs the above equation
From (2) and (7)     d_IM= S_d ・ D_L          = S_d ・ K (f, β) ・ θ …………… (9) It is. On the other hand, the actual image
Displacement D_IMIs given by the above equations (2) and (8)     D_IM= S_d ・ D_L            = S_d ・ K (Z, B) ・ θ ……………… (10) Becomes Therefore, the image blur correction error (image blur displacement δ) is     δ = d_IM-D_IM       = S_d ・ {K (f, β) -K (Z, B)} ・ θ (11) And the eccentric sensitivity S_d Error of vibration proof sensitivity,
The difference between the true value and the actual value "k (f, β) -K (Z, B)"
And the camera shake angular displacement θ. This image blur correction error, that is, the image blur correction
FIG. 5D shows the image shake displacement δ after the right.
As shown in Fig. 5 (b), the image stabilization sensitivity by zooming operation
The image blur displacement δ increases as the degree error increases,
Time t₁ , T_Two , T_Three Error disappears suddenly
At this time, the displacement δ changes discontinuously at this time.
I do. At time t₁ And the displacement (δ) is discontinuous
The reason for this is that, as described above, in equation (11), when θ = 0,
Image, the image stabilization error is reflected in the image shake displacement δ
Because it was not done. Now, an image blur displacement as shown in FIG.
Is larger than the magnitude of the image shake displacement δ,
Great change is more of a problem. That is, perform image blur correction
While zooming, image shake due to camera shake is significant
But the image stabilization sensitivity K (Z, B) switches.
Time t_Two , T_Three The image moves suddenly in
Become. Therefore, the exposure is performed just at this time.
If it does, even if the exposure time is short, it will shake very much
You will get a photo. thisFirst reference technology example
Then, it is explained earlier that such a disadvantage is solved.
It is on the street. FIG. 1 shows a camera provided with the above-described imaging optical system.
MeLa LordFIG. 2 is a configuration diagram showing a main part. In FIG. 1, CMR is a camera body.
LNS is detachable from the camera body CMR (exchange
A) lens. First, the configuration of the camera body CMR side
explain. CCPU is a microcomputer in the camera, ROM,
One chip my with RAM, A / D, D / A conversion function
And the camera seed stored in the built-in ROM.
Automatic exposure control, automatic focus adjustment according to Kens program
Performs a series of camera operations such as knots and film winding. So
The microcomputer CCPU in the camera is
Each circuit communicates with the peripheral circuit in R and the lens LNS
And control the operation of the lens. LCM is a lens communication buffer circuit,
When power is supplied to the lens LNS via the power line VL,
And a signal line from the camera body CMR to the lens LNS
Output via DCL and camera book from lens LNS
Between the lenses of the output via the signal line DLC to the body CMR
It becomes a communication buffer. SNS is a focus detection composed of a CCD or the like.
Line sensor (hereinafter simply referred to as sensor) for SDR
Is the drive circuit, which is instructed by the microcomputer CCPU in the camera.
The sensor SNS is further driven, and an image signal from the sensor SNS is transmitted.
Signal and amplify it and send it to the microcomputer CCPU in the camera.
Put out. The light from the lens LNS is transmitted to the main mirror M
M, focus glass PG, and pentaprism PP
The light enters the optical sensor SPC and its output signal is
Input to the control CCPU and according to a predetermined program.
Used for automatic exposure control (AE). DDR is a switch detection and display circuit.
Data sent from the microcomputer CCPU in the camera
Switches the display on the camera display member DSP based on the
And various switch members of the camera (such as SWAZ described later)
The on / off state of the camera is communicated by the microcomputer CC in the camera.
Notify PU. SWAZ is an auto zoom switch.
When the switch SWAZ is turned on, a predetermined program
Zoom drive by driving the zoom drive motor
Is performed. SW1 and SW2 are release buttons (not shown).
The first step of the release button
The switch SW1 is turned on by the downward movement, and subsequently the second stage
The switch SW2 is turned on by pressing down to. My in camera
As will be described later, the control CCPU controls the switch SW1.
Turn on to open metering, auto focus operation and image stabilization operation.
A start signal is generated, and this is turned on when the switch SW2 is turned on.
Exposure control and film winding are performed as triggers. MTR1 is a film feed motor.
MTR2 is mirror up / down and shutter spring
It is a motor for charging, and each drive circuit MDR1,
Control of forward rotation and reverse rotation is performed by MDR2. MG1 and MG2 are shutter first curtain and rear curtain, respectively.
An electromagnet for starting traveling, which includes amplification transistors TR1, TR
2 and shut down by the microcomputer CCPU in the camera.
STR is controlled. Next, the configuration of the lens LNS will be described.
I do. LCPU is a microcomputer in the lens,
ROM, RAM, A / D,
1-chip microcomputer with D / A conversion function
From camera body CMR via signal line DCL
Drive the focus lens FLNS according to the instructions
Motion control and aperture drive control are performed. Also, the lens
Various operating conditions (how much focus adjustment optics
Or how many stops the aperture is down) and parameters (open
F-number, focal length, relationship between defocus amount and extension amount
Number etc.) through the signal line DLC to the camera body CMR side
Send to FMTR is a focus drive motor,
Turn the helicoid ring (not shown) through the yatrain
Focus adjustment by moving the focus lens FLNS back and forth in the optical axis direction
I do. FDR is the focus driving motor FM
The drive circuit of the TR
Forward / reverse rotation of the motor FMTR, brake, etc.
Control. [0064]Example of Fig. 1So, the front focus type
An example is shown and a focus adjustment command is issued from the camera body CMR.
Is sent, the driving amount and direction sent at the same time
Drives the focus drive motor FMTR according to
Move the focus lens FLNS in the optical axis direction
Adjust the focus. Movement amount of the focus lens FLNS
Is monitored by the pulse signal of the encoder circuit ENCF,
Count by the counter in the microcomputer LCPU in the lens.
When the predetermined movement is completed, the motor FMTR is turned on.
Control. For this reason, once the camera body CMR
After the adjustment command is sent, the microcomputer CCPU in the camera
Indicates that the lens drive is
No need to be involved. Also, if necessary,
Data can be sent to the camera body CMR.
It has become. ZMTR is a zoom drive motor, not shown.
Rotate the zoom cam ring to perform zooming. ZDR is the above-mentioned zoom driving motor ZMTR.
Drive circuit, the signal from the microcomputer LCPU in the lens
Therefore, control of forward / reverse rotation of the motor ZMTR, braking, etc.
I will do it. SWZM is a zoom operation switch, so-called
With power zoom switch, slide member or rotating part
How to drive the zoom drive motor ZMTR by operating the material
Direction and driving speed. For example, to ground contact
On the other hand, when the contact SWZM1 is turned on (closed),
When the contact SWZM2 is turned on at a low speed,
Zoom in at high speed to zoom in
The driving motor ZMTR is controlled. Similarly, contact SW
When ZM3 and SWZM4 are turned on
Zooming is controlled at low speed and high speed. ENCB is the absolute value of the focus lens FLNS.
ENCZ is an encoder that detects pair position
Encoders that detect position
Code patterns and detection blocks provided on the id ring and zoom ring
The signal detected by a known method such as
To the LCPU and the image blur correction microcomputer ICPU
I do. An aperture control command is sent from the camera body CMR.
The number of stops sent simultaneously.
And a known stepping motor D for driving the aperture
Drive MTR. The ICPU is an image blur correction microcomputer,
Controls the correction operation and sends the lens LNS
Line of the signal DCL to the camera and the camera from the lens LNS
In the camera through the line of the signal DLC to the main body CMR
It communicates with the microcomputer CCPU. Also, in the lens
It also has a transmission / reception line with the control LCPU. Therefore,
The three microcomputers CCPU, LCPU and ICPU are mutually
It is configured to be able to communicate. AD is a shake for detecting a shake of the lens LNS.
This is an angular displacement meter that is a detection sensor.
Japanese Patent Application No. Hei 2-2011183 proposed by the applicant
A sensor using the inertia of fluid in a cylindrical case is used.
It is. The angular displacement output θ of the angular displacement meter AD is
Sent to the con ICPU. Also, an image stabilization microcomputer
Control the response frequency characteristics of the angular displacement meter AD from the ICPU
Control signals SAD1 and SAD2 are transmitted. ICNT is an image blur correction control circuit,
Data, amplifier, switch, etc.
Drives and controls the actuator IACT, which will be described later.
Position detection sensor PSD and image blur correction microcomputer ICPU
Signal input and output lines. ILNS is an optical axis eccentric means.
Guide mechanism (not shown) with a correction optical system (second group in FIG. 2).
, And can be moved parallel to a plane perpendicular to the optical axis.
Wear. The IACT is an image shaker provided in the support mechanism.
Actuator that corrects magnetic fields created by permanent magnets.
And a coil moving in the magnetic circuit.
Then, the shake correction optical system ILNS is displaced. The PSD is the position of the shake correction optical system ILNS.
Position detection sensor for detecting the position of the infrared light emitting diode I
Light from the RED moves integrally with the shake correction optical system ILNS.
After passing through the slit SLT, the position detection sensor PSD
Of the position detection sensor PSD
Is the position of the incident light, that is, the position of the shake correction optical system ILNS.
Signal. And this position signal is
Microcomputer ICPU and image blur correction control circuit ICNT
Is entered. SWIS is a main switch of an image blur correction system.
When the switch SWIS is turned on, the image blur correction
Power is supplied to the computer ICPU and its peripheral circuits, and the image
The correction control circuit ICNT starts operating. And mosquito
When switch SW1 of camera body CMR is turned on,
The signal is sent to the microcomputer LCPU in the lens and the
Actuator for image blur correction communicated to the ICPU
The IACT is driven to start the image blur correction operation. Next, the camera body CMR having the above configuration
FIG. 6 and FIG.
This will be described with reference to FIG. First, using the flowchart of FIG.
The operation of the camera body CMR will be described. A power switch (not shown) on the camera body CMR side
When the switch is turned on, power is supplied to the microcomputer CCPU in the camera.
Is started, and after step (001), step (00)
The operation from 2) is started. [Step (002)] Press the release button in the first step
Detects the state of the switch SW1 which is turned on by the bottom,
When the switch SW1 is off, go to step (003).
Transition. [Step (003)] In microcomputer CCPU in camera
All the control flags and variables set in the RAM
Clear and initialize, and proceed to step (004). [Step (004)] Image blur correction to lens LNS side
A command to stop the operation (IS) is transmitted. Steps (002) to (004) are performed in steps
Switch SW1 is turned on or power switch is turned off
It is executed repeatedly until When the switch SW1 is turned on,
Then, the process proceeds from step (002) to (011). [Step (011)] Lens communication 1 is performed. This message
Shin performs exposure control (AE) and focus adjustment control (AF).
Communication to obtain the information necessary for
CCPU is a microcomputer in the lens via signal line DCL
When a communication command is sent to the LCPU, the microcomputer L in the lens
The CPU is stored in the ROM via the signal line DLC.
Information such as focal length, AF sensitivity, and open F-number
Send [Step (012)] Image blur correction to lens LNS side
Send a command to start operation. [Step (013)] “Photometry” for exposure control
Execute the routine. That is, the microcomputer CC in the camera
PU analyzes the output of the photometric sensor SPC shown in FIG.
Input to the input terminal, perform A / D conversion, and
Obtain the photometric value Bv. [Step (014)] The “exposure” for obtaining the exposure control value
Out subroutine "is executed. In the subroutine
Is the Apex operation formula “Av + Tv + Bv + Sv” and
According to a predetermined program diagram, the shutter value Tv and the aperture
Determine the value Av and store them at a predetermined address in the RAM
I do. [Step (015)] Lens communication 2 is performed. this
Is the image stabilization sensitivity K (Z, B) in the image blur correction operation.
This is a communication to check whether the value has just changed or not.
The microcomputer CCPU in the camera is the image blur correction microcomputer ICP
It is necessary to send the anti-vibration sensitivity switching flag FLK to U
Request and receive this. The flag FLK will be described later.
The anti-vibration sensitivity K (Z, B) has been switched due to zooming, etc.
After that, "FLK = 1" only within a predetermined time, other times
This flag is set to “FLK = 0”. [Step (016)] Determine the value of the flag FLK
I do. Here, “FLK = 1”, that is, the image stabilization sensitivity K
If (Z, B) has just been switched, FIG.
Abrupt image blur correction error may have occurred as shown in
Therefore, the process does not proceed to the next step.
Return to 15) and repeat steps (015) and (016)
return. Then, when “FLK = 0” is reached, step (01)
Proceed to 7). [Step (017)] "Image signal input" subroutine
Execute In this routine, the microcomputer CCP in the camera is used.
U starts and stops the accumulation of the image signal to the AF sensor SNS.
And the transfer of the image information signal detected by the sensor SNS.
Enter the issue. [Step (018)] Based on the input image signal
To calculate the defocus amount of the focus lens FLNS
You. That is, the “focus detection calculation” subroutine is executed.
You. The above steps (017) and (018)
The subroutine flow is described in Japanese Patent Application
-160824 and the like.
Will not be described in detail. [Step (019)] A focus lens drive instruction is issued.
Transmit to the lens LNS side. In this step the camera book
The format calculated in step (018) on the body CMR side
The number of drive pulses of the focus lens FLNS
Only to the control LCPU.
Controller LCPU focuses according to the specified acceleration / deceleration curve
The drive of the drive motor FMTR is controlled. [Step (020)] Press the release button in the first step
The state of the switch SW2 which is turned on from below is detected.
And the switch SW2 isoffThen step (00
Returning to 2), the flow is repeatedly executed, and the switch S
If W2 is on, release operation after step (031)
Execute [Step (031)] Focus lens FLNS
Stop command, stop command, and stop step
To the internal microcomputer LCPU. [Step (032)] The rotation of the motor MTR2 is controlled.
To raise the click return mirror MM. [Step(033), (034)] The above step
Similarly to (015) and (016), the image stabilization sensitivity K (Z,
It is checked whether or not B) has just been switched. And
"FLK = 1", that is, switching of sensitivity K (Z, B)
Immediately after, the image blur correction error changes greatly and sharp images
The exposure operation is not performed and the step
It stays at (033) and (034). Thereafter, in step (034), “FLK =
If it becomes "0", the process proceeds to step (035). [Step (035)] Start of shutter first and second curtain running
Power is supplied to the electromagnets MG1 and MG2 to drive the shutter STR.
To perform an exposure operation. [Step (036)] Return aperture to lens LNS
Send return instruction. [Step (037)] Control the rotation of the motor MTR2.
Click return mirror MM and shutter spring
Charge. [Step (038)] For controlling the rotation of the motor MTR1
The film is wound up. Thus, one release operation is completed.
Return to step (002). Next, referring to the flowchart of FIG.
This is performed by the image blur correction microcomputer ICPU in the lens LNS.
The image blur correction operation will be described. [Step (101)] Image blur correction main switch
Microcomputer ICPU for image blur correction by turning on SWIS,
Power is supplied to the peripheral circuits, the angular displacement meter AD, and the like. This
As a result, the microcomputer ICPU for image blur correction operates as shown in FIG.
The execution of the program after step (102) is started. [Step (102)] Image blur correction microcomputer ICPU
Clears all flags and variables in, and sets them to “0”. [Step (103)] Image blur correction (IS) start instruction
And the IS start command is received from the camera body CMR.
If not, the process proceeds to step (104). [Step (104)] Image blur correction actuator
Stop driving of the IACT and set the shake correction optical system ILNS
Fix to the origin position. The above steps (103) to (104)
Receives IS start command from camera body CMR during execution
From step (103) to step (111)
Run. [Step (111)] Zoom and focus encoder
The current zoom zone and frame are set by the encoders ENCZ and ENCB.
Detect the focus zone. [Step (112)] Check in the above step (111).
RO sensitivity of the vibration isolation sensitivity K (Z, B) corresponding to the issued zone
M from the look-up table, and
The new value is stored in a register KNEW. [Step (113)] Excess of vibration isolation sensitivity K (Z, B)
The value of the register KOLD storing the previous value is determined. Up
Go through this step for the first time since step (103)
Time is initialized to “KOLD = 0”.
Proceed to step (114). [Step (114)] Set in the above step (112).
Stores the value of the specified register KNEW in the register KOLD
Then, the process proceeds to step (115). The number of passes in step (113) is two
In the case of the second and subsequent times, some value is stored in the register KOLD.
Since it is stored, step (113) to step
Proceed to (115). [Step (115)] The anti-vibration sensitivity K (Z, B) changes.
It is determined whether or not it has been converted. That is, the past of the sensitivity
(The value of the register KOLD) and the step (112)
The latest value (the value of the register KNEW) read and set in
If the two match, go to step (119).
And if they do not match, proceed to step (116).
You. Here, first, K (Z, B) is switched.
If they do not match, that is, if they match.
Will be described. [Step (119)] Latest anti-vibration sensitivity (register
KNEW) to the register K. [Step (120)] The above expression(8)Swing according to
Displacement D of correction optical system ILNS_L Is calculated. In step (121), a shake correction optical system
ILNS is calculated as the displacement amount D_L Drive control is performed according to. [Step (122)] The lens communication 2 shown in FIG.
Check if the request comes from the camera body CMR
If it has, the contents of the flag FLK (described later)
And sends it to the microcomputer CCPU. [Step (123)] IS stop command from camera
It is determined whether or not the instruction has been received.
Return to steps (103) and (104) to stop image blur correction
And if the instruction has not come, return to step (111).
And the image blur correction flow is repeated. Next, during the image blur correction, zooming,
Alternatively, focusing is performed, thereby
Operation when the sensitivity K (Z, B) value is switched,
Past value (value of register KOLD) and latest value of sensitivity
When the value of (register KNEW) does not match,
explain about. In steps (111) and (112), the latest
The anti-vibration sensitivity K (Z, B) is detected, and this is registered in the register K.
Store it in NEW, and go to the next step (113)
When proceeding to (115), the image stabilization sensitivity K (Z, B) is cut off.
In other words, "KOLD @ KNEW"
Therefore, proceed from step (115) to step (116).
No. [Step (116)] Switching of anti-vibration sensitivity described later
A flag indicating whether timer T has started measuring time.
The lag FLK is determined. This flag FLK is
Points to the flags shown in steps (016) and (034).
Then, when the flag FLK is “0”, step (11)
Proceed to 7). That is, in step (115), the
The degree K (Z, B) is switched and this step (1)
After switching the sensitivity in step 16), the elapsed time is measured.
Step if it is determined that timer T has not started
Proceed to (117). [Step (117)] Vibration isolation sensitivity K (Z, B) is off.
Start timer T to measure elapsed time after switching
And start measurement. [Step (118)] The timer is measuring
Is set to "1". Thereafter, there is no step (119) described above.
After that, the process returns to step (111). After executing the above flow, step (1) is executed again.
When returning to 15), "KOLD @ KNEW" is displayed as before.
Therefore, step (115) to step (11)
Proceed to 6), but in the previous step (118)
Since FLK is set to "1",
The process proceeds from step (116) to step (131). [Step (131)] The value of the timer T currently being measured and
The timer upper limit value To is compared. Here, the above timer upper limit value To is shown in FIG.
When the image stabilization sensitivity is switched as described in 5
Time required for the rapid movement occurring in the system ILNS to subside
Is set in advance according to the dynamic characteristics of the shake correction optical system ILNS.
Is done. The shake correction optical system ILNS is normally high.
Since high dynamic characteristics are required, the timer upper limit value To is also
A relatively short time, for example, 100 msec is set
And On the other hand, steps (111) to (123)
Considering the response of image blur correction,
It needs to be executed in a very short time, for example, several msec. Therefore, for the first time from step (116),
When we move to Tep (131), "T <To"
, So step from step (131)
Move on to (119), step (119) to step
The image blur correction control of (123) is performed. In this process,
The correction is based on the latest anti-vibration sensitivity (register KNEW value).
The flag FLK is set to “1”.
ing. After the above flow is repeatedly executed, step
When “T ≧ To” is satisfied in (131), the step (1)
The process proceeds from step 31) to step (132). [Step (132)] Stop timer T to "0"
Reset and proceed to step (133). [Step (133)] Reset the flag FLK to “0”
To display that the timer T is stopped. [Step (134)] The latest value of the image stabilization sensitivity (Regis
(KNEW value) register is stored in KOLD, and KOL
D is updated, and the routine goes to step (119). Then, steps (123) and (111)
When returning to step (115) via
= KNEW ”at this time, the step (1
Go to 19). That is, according to the above flow, the image blur
During correction control, the value of the image stabilization sensitivity K (Z, B) is switched
After that, the flag FLK is set to "1" for a predetermined time after that.
In response to a communication request from the camera, this flag FL
Send the contents of K to the camera. The microcomputer in the lens in the lens LNS
Since the operation of the LCPU is not directly related to the present invention,
Details are omitted. The flow of FIG. 6 and FIG.
To explain: 1) When the switch SW1 of the camera is turned on, the camera
Icon CCPU starts AE and AF,
The LCPU starts image blur correction. 2) Image blur correction microcomputer LCPU is
When it is detected that the image stabilization sensitivity has changed during correction,
The time and the flag FLK are set to “1”. 3) Image accumulation and film exposure operation
Before starting, the microcomputer CCCPU in the camera corrects the image blur.
Requests transmission of flag FLK to microcomputer LCPU.
U. Then, during “FLK = 1”, that is, a sharp image shake
While the correction error is occurring, the AF sensor SNS
Prohibit image storage and exposure. During the rapid image blur correction error, the AF image accumulation,
Or AF error due to exposure, or
Prevents taking a shake photo. (Second reference technology example)First reference
Technical examplesThen, when the vibration isolation sensitivity switches,
Prohibits AF image accumulation or film exposure
Was to do. However, in this first embodiment,
Means that if the prohibition operation is activated, AF
The problem is that the image accumulation or exposure response is delayed.
is there. Therefore, it will be described below.Second reference technology
An exampleNow, AF image accumulation or image stabilization sensitivity during exposure
When switching occurs, AF image accumulation or exposure
Switching of the sensitivity is prohibited until the end
You. Hereinafter,Second reference technology exampleIn operation in
This will be described with reference to the flowcharts of FIGS.
You. Camera (camera body CMR, lens LNS)
Is composed ofFirst reference technology exampleIs the same as
Omitted. FIG.Second reference technology exampleCamera in
Is a flowchart showing the operation of the internal microcomputer CCPU.
You. Note that the aboveFirst reference technology exampleFigure in
Steps (015), (016), (017) and
(033), (034), and (035) correspond to step (0)
41), (042), (043) and (051), (0
52) and (053) are different only in place of
The same steps are denoted by the same numbers. And here
Now, only the changed part will be described. In FIG. 8, exposure is performed in step (014).
After the calculation, the process proceeds to step (041). [Step (041)] Image blur correction on the lens LNS side
Sends the vibration suppression sensitivity switching prohibition command to the microcomputer ICPU
I believe. [Step (042)] Step (017) in FIG.
Similarly, image storage and reading of the sensor SNS are performed. Soshi
When the image signal input is completed, the process proceeds to step (043).
No. [Step (043)] Switching of image stabilization sensitivity is prohibited
A release command is transmitted to the image blur correction microcomputer ICPU. So
To perform the “focus detection calculation” subroutine
Proceed to (018). Steps (051) to (053) are the same.
Before and after the shutter control in step (052),
Transmission of command to prohibit switching of vibration isolation sensitivity at step (051)
Then, the prohibition release transmission of step (053) is performed. Thus, during accumulation of the AF image and during exposure, the lens
Command is issued to the LNS side.
Will be. FIG.Second reference technology exampleLens in
The operation of the image blur correction microcomputer ICPU on the LNS side is shown.
It is a flowchart. Note that the aboveFirst reference technology exampleFigure in
7 steps (115) to (119) and (13)
Steps (14) instead of (1) to (134)
1), (142), (143), and (144) are replaced
The only difference is that step (122) has been abolished.
Therefore, other same steps are indicated by the same numbers,
Only the points that are described below. In FIG. 9, step (113) or
Goes to step (141) after executing (114). [Step (141)] Vibration proof sensitive from camera CMR side
It is determined whether or not a degree switching prohibition command has been received. Soshi
If the prohibition command has not been received, go to step (142).
Move on. [Step (142)] Registers KOLD and KNEW
Are compared, that is, whether the image stabilization sensitivity has switched
Is determined, and if not switched, “KOLD = KN
EW "so go to step (144) and switch
If yes, go to step (143). [Step (143)] Stored in the register KOLD
Update the anti-vibration sensitivity. Then, step (1)
Go to 44). [Step (144)] A cash register for storing the image stabilization sensitivity K
The value of the register KOLD is substituted for the star K. And shake
Displacement D of the correction optical system_L (12)
Go to 0). Here, in the above step (144),
Substitute the past value (the value of the register KOLD) into the register K
However, after step (142) or (143),
In any case, the check in step (144)
The value of the register KOLD is equal to the register KNEW. sand
In other words, the control of the shake correction optical system ILNS is the latest image stabilization sensitivity
This is done using degrees. On the other hand, in step (141),
If the command to inhibit the sensitivity switching has been received, step (14)
4) If the image stabilization sensitivity is switched,
The image blur is corrected based on the sensitivity (the value of the register KOLD).
Then, the image blur in steps (111) to (123) is performed.
Repeatedly execute the correction control and disable the sensitivity switching from the camera
When the stop command is released, steps (141) to (14)
Proceed to 2). Then, the anti-vibration sensitivity is determined in step (14).
Switch during execution of jump from 1) to (144)
If it is, it will be "KOLD @ KNEW".
In step (143), the value of the register KOLD is updated.
At last, image blur correction control with the latest image stabilization sensitivity
Switch. Note that thisSecond reference technology exampleAt
Also, the operation of the microcomputer LCPU in the lens in the lens LNS
Are not directly related to the present invention, and thus the details are omitted.
You. The flow of FIG. 8 and FIG.
Then 1) The microcomputer C in the camera is turned on by turning on the switch SW1.
The CPU starts AE and AF, and the microcomputer LCP in the lens.
U starts image blur correction. 2) The microcomputer CCPU in the camera detects the focus.
During image accumulation of the sensor or during exposure, the lens LNS side
The command to prohibit switching of the image stabilization sensitivity is sent to. 3) The microcomputer LCPU in the lens issues the prohibition command.
Even if the image stabilization sensitivity changes during the
Performs image blur correction control using the previous value, and releases the prohibition command.
After that, the latest value of the image stabilization sensitivity is adopted. AF image accumulation or rapid image shake during exposure
To prevent a correction error from occurring. (Third reference example)1st, 2nd
Reference technology examplesThen, suddenly when switching the vibration isolation sensitivity
Image blur correction error and AF image accumulation or exposure
It does not happen sometimes. On the other hand,
At the time of switching, as shown in FIG.
With the rapid movement of academic ILNS, the image blur correction activator
The heater LACT consumes a large amount of power. Therefore,
At the same time, if it overlaps with the rise of another actuator,
High power consumption occurs, and these actuators are not driven.
Good, or insufficient power supply to the microcomputer etc.
It may interfere with the normal operation of the camera. Therefore,Third reference exampleIn
When the focus drive motor FMTR starts up, or
At the time of driving the aperture driving stepping motor DMTR
Is intended to prevent the switching of the vibration isolation sensitivity.
is there. Note that thisThird reference exampleOK, turtle
The operation of the microcomputer CCPU in the second embodiment is the same as that of the second embodiment.
The image blur correction microcomputer ICPU is the same as FIG.
Works the sameSecond reference technology exampleSame as FIG. 9 in FIG.
Therefore, according to the flowchart of FIG.
The operation in the LCPU will be described. By turning on the power switch of the camera body,
In step (201), power is also supplied to the lens side circuit.
Then, the microcomputer LCPU in the lens starts from step (202).
Start descending operation. [Step (202)] The microcomputer LCPU in the lens
All control flags and variables set in RAM
Clear and initialize, and proceed to step (203). [Step (203)] Fore from the camera body CMR
Determines whether a lens drive command has been received, and
If not, proceed to step (210).
Proceed to step (204). [Step (204)] Focus driving motor FM
Start timer T2 to measure from the rise of TR
And proceed to step (205). [Step (205)] Here, the value of the timer T2 and the timer
A comparison with the predetermined value TF is performed. Here, the predetermined value TF is the focus drive.
Time during which a large current flows when the driving motor FMTR starts up
It is. And"T2<TF ”still focus drive
It is determined that a large current is flowing through the driving motor FMTR.
Proceed to step (206). [Step (206)] The microcomputer LCPU in the lens is
Switching of image stabilization sensitivity to the image blur correction microcomputer ICPU is prohibited.
Send stop command. Then, proceed to step (208).
No. On the other hand, in step (205), "T2 ≧ T
F ”is detected. [Step (207)] Here, the image stabilization sensitivity is switched.
Release the prohibition command. Then, step (208)
Proceed to. [Step (208)] Focus driving motor FM
The drive of the TR is controlled, and the process proceeds to step (209). [Step (209)] The focus drive motor
It is determined whether the driving of the FMTR has been completed. Soshi
If the driving is not completed, the process returns to step (205), and the driving is completed.
Go to step (210). [Step (210)] From the camera body CMR
Judge whether a motion command is coming or not.
Return to step (203), and if yes, step (211)
Proceed to. [Step (211)] Similar to step (206),
Switching of image stabilization sensitivity to the image blur correction microcomputer ICPU is prohibited.
Send stop command. [Step (212)] Aperture drive stepping mode
The drive of the DMTR is controlled, and the process proceeds to step (213). [Step (213)] Determine whether or not the aperture drive has been completed.
Judge, if not completed, return to step (211), if completed
Proceed to step (214). [Step (214)] Similar to step (207),
Send the prohibition command release to the image blur correction microcomputer ICPU
Then, the process returns to step (203). Therefore, according to this flow, the focus drive
After a predetermined time TF from the start of the operation of the driving motor FMTR,
During the stop and while the diaphragm is being driven, switching of the vibration isolation sensitivity is prevented,
High current consumption timing of multiple actuators overlaps
Can be prevented. It should be noted that thisThird reference exampleAt
The focus drive motor FMTR is connected to another actuator,
For example, even if the zoom drive motor ZMTR is replaced,
The effect of can be obtained. [0129]Next, examples of the present invention will be described in detail.
explain.  (FirstExample of the above)First and second participation
Technical examplesNow, sudden image shake when switching the image stabilization sensitivity
Correction error, exposure control, image storage in AF sensor SNS
Product or activation of other actuators simultaneously
Was prevented. But theseTechnical examplesso
Indicates that the sharp image blur correction error itself has not been resolved.
No. Accordingly, the following of the present inventionFirst embodimentso
Should prevent the occurrence of the sudden image blur correction error.
Trying to do it. Referring to FIG.First embodimentThe effect of
I will tell. FIGS. 11A to 11D illustrateFirst participant
Technical examplesThis corresponds to FIG. 5 used for the description of FIG.
Here, the difference from FIG. 5 is that the vibration isolation sensitivity K of FIG.
This is the switching operation of (Z, B). The aboveFirst reference technology exampleSo, Zoomin
With the vibration operation, the sensitivity K (Z, B) becomes equal to the time t.₁ , T
_Two , T_Three Suddenly switched, but thisFirst embodimentso
Is the vibration isolation sensitivity K as indicated by the dashed line in FIG.
(Z, B) is the time t₁ , T_Two , T_Three From time tc
It is configured to change gradually. Therefore, the shake correction light
Displacement of image-related ILNS and image shake displacement (= image shake correction error
-) Shows that the rapid change is solved as shown in Figs.
Has been erased. FIG. 12 is a block diagram showing a configuration for realizing the above operation.
5 is a flowchart of an image blur correction microcomputer ICPU.
This flow isFirst reference technology exampleAnd the flow of FIG.
There are many common parts, and the anti-vibration sensitivity register KNEW,
Since KOLD and timer T are used with the same definition,
The description will be omitted by omitting overlapping portions. Turn off the image blur correction main switch SWIS.
After execution, step (302) is executed from step (301).
Step until the IS start command does not come from the camera.
(303) and (304) are repeatedly executed. Receive IS start command from camera body CMR
Then, the process proceeds to the step (311) where the zoom zone and the
The focus zone is detected, and then in step (312)
Anti-vibration corresponding to the zone detected in step (311)
Sensitivity K (Z, B) is calculated by R
Read from the OM lookup table and register
Store in KNEW. Then, proceed to step (313).
No. In the step (313), the register KOLD
Is checked, and if this value is "0", step (314) is executed.
To store the value of the register KNEW.
Proceed to step (315) without going through step (314)
No. Then, in step (315), the current
Value (register KNEW value) and past value (register K
OLD value), and if they match, step
Proceeds to (335) and stores the value of the register KNEW in the register K.
Is stored. In step (320), whether the angular displacement meter AD
The vibration displacement θ and the vibration isolation set in step (334)
Control displacement D of shake correction optical system using sensitivity K_L Calculate
Then, in the next step (321), the actuator IACT
Drive control. Then, in step (322), the camera
If it is determined that the IS stop command has not been received from the main unit CMR
Return to step (311) and repeat the image blur correction flow
You. During the image blur correction, during zooming,
Readout of vibration proof sensitivity by focusing operation
When the value changes, the step (3) is performed from the step (315).
Move to 16). In step (316), the vibration proof sensitivity is linked.
The flag FLC indicating that the switching is continuously performed is determined.
However, since “FLC = 0” at first, step (3)
Proceed to 17). And in this step (317),
Timer T that measures time from start of vibration sensitivity switching
Is started, and the flag FLC is set in step (318).
Set to 1. In the next step (319), the following
formula K = (KNEW-KOLD) * T / Tc + KOLD Is calculated according to the following equation. Here, Tc is shown in FIG.
This is the sensitivity switching time tc of 1 (b). That is,
According to the above equation, the vibration isolation sensitivity K is represented by a dashed line in FIG.
It changes according to the straight line shown. Subsequently, in steps (320) and (321),
Performs displacement calculation and drive control of the shake correction optical system ILNS.
Step (31) via the next step (322)
Return to 1). Then, steps (311) through (31)
Execute step 5) and return to step (316).
Set to "FLC = 1" at step (318)
Therefore, the process moves from step (316) to step (331).
You. Then, at step 331, the timer passing time T is
The upper limit value Tc is compared, and if “T <Tc”, the step is performed.
Proceed to (319) to continuously switch the vibration isolation sensitivity K.
continue. On the other hand, when “T ≧ Tc”, the above switching is performed.
Has been completed, the process proceeds from step (331) to (332).
move on. At step (332), the timer T is set to "0".
To stop, and in step (333), the flag FL
C is reset to 0, and the continuous switching of the vibration isolation sensitivity is completed.
Display that you have completed. Then, at step (334),
The value of the star KOLD is updated, and in step (335), the cash register
The latest value (the value of the register KNEW) is assigned to the star K. According to the above flow, the prevention during the image blur correction is performed.
The readout value from the ROM of the vibration sensitivity is cut in steps.
Even if it is changed, as shown in FIG.
, So that the image changes rapidly
No shake correction error occurs. (Second embodiment)First embodimentso
Indicates that the predetermined time tc for switching the image stabilization sensitivity is constant.
However, the zooming or focusing speed is too fast
Therefore, the switching timing of K (Z, B) falls below tc.
Then, a sharp image blur correction error also occurs. There
In the fifth embodiment of the present invention, the switching time tc is
Variable depending on zooming or focusing speed
What you want to do. Hereinafter, the flow chart of FIG.
I will explain according to the The flow of FIG.Second embodimentof
In the flow of FIG. 12, steps (311) and (31)
Steps (341) and (342) are newly added during 2).
It has been added. In FIG. 13, the result of step (311) is
After the line, zooming and focusing are performed in step (341).
Detect the singing speed. This detection method .Zoom drive motor ZMTR or focus drive
Actual rotation speed of the motor FMTR
The rotation instruction speed by the icon LCPU is detected. .Zoom zone or focus zone
Switching timing intervals, specifically, the steps in FIG.
Use timer means different from the timer T in the tap (317).
To measure the zone switching timing interval. Is possible. Subsequently, in step (342), the reference
Time Tco, zoom speed Vz, and focus speed V
switching by the function func (Vz, Vf) by f
The time Tc is calculated. Here, the function func (Vz,
Vf) becomes func (Vf) when Vz and Vf become small.
z, Vf) is a function that increases, and together with Tco
The image blur correction microcomputer is stored in the ROM of the ICPU.
You. Subsequently, step (312) and subsequent steps are executed.
And T in steps (319) and (331)
c is the value calculated in the above step (342).
You. That is, according to the above flow, zooming or
Is the anti-vibration sensitivity switching time according to the focusing speed
Since tc changes, fine vibration isolation corresponding to the speed
Sensitivity change is possible. (Third embodiment)First and second fruits
ExampleIs to switch the anti-vibration sensitivity continuously within a predetermined time.
This prevents sudden movement of the image stabilization optical system.
It can be replaced by other methods. Below, this book
InventionThird embodimentAs a flowchart of FIG.
It will be described using FIG. FIG. 14 shows the control of the shake correction optical system ILNS.
Displacement values are calculated for both past and recent vibration isolation sensitivities.
And calculate the actual control displacement from the results of these two calculations.
The value is obtained. The flow of FIG. 14 is different from that of the fourth embodiment.
Steps (319) and (320) in FIG.
Instead of (351) and (352), step (33)
Only the place where (353) is added after 5) is changed
Therefore, only the changed part will be described. In step (351), the past of the image stabilization sensitivity
Correction optics using the value KOLD and the latest value KNEW
Control displacement value D of the system_L1, D_L2Is calculated. Then step
In (352), D_L = (D_L2-D_L1) * T / Tc + D_L1 According to the actual control displacement value D_L Is calculated, and step (3)
At 21), lens control is performed. On the other hand, when the image stabilization sensitivity does not change,
Otherwise, if the predetermined time has elapsed after the change, the step (3)
From 35), proceed to step (353), where the latest value
(cash register D_L = K * θ According to the actual control displacement value D_L Is calculated, and step (3)
At 21), lens control is performed. ThisThird embodimentNow, the vibration sensitivity
Although it is not changing continuously, as a resultFirst
Example ofThe same effect is obtained. [0155] [0156] [0157] [0158] [0159] [0160] [0161] [0162] [0163] [0164] [0165] [0166] [0167] [0168] [0169] [0170] [0171] [0172] As described above, according to the present invention,
IfGenerated by moving the zoom optics and focus adjustment optics
Alleviates sharp image blur errors
What can provide an image blur correction device capable of performing correction
It is. [0173] [0174] [0175] [0176] [0177]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration diagram schematically showing a camera including an image blur correction device according to a first reference example of the present invention. FIG. 2 is a diagram showing a state of the imaging optical system of FIG. 1 during zooming. FIG. 3 is a diagram for explaining the image stabilization sensitivity of the imaging optical system of FIG. 2; FIG. 4 is a diagram showing matrix data of image stabilization sensitivity of the imaging optical system of FIG. 2; FIG. 5 is a diagram for describing an image blur correction operation in the first reference example of the present invention. FIG. 6 is a flowchart illustrating an operation of the microcomputer in the camera of FIG. 1; FIG. 7 is a flowchart illustrating an operation of the image blur correction microcomputer of FIG. 1; FIG. 8 is a flowchart showing the operation of the microcomputer in the camera according to the second embodiment of the present invention; FIG. 9 is a flowchart illustrating an operation of an image blur correction microcomputer in a second reference example of the present invention. FIG. 10 is a flowchart illustrating an operation of a microcomputer in a lens according to a third reference example of the present invention; FIG. 11 is a diagram for describing an image blur correction operation according to the first embodiment of the present invention. FIG. 12 is a flowchart illustrating an operation of the image blur correction microcomputer according to the first embodiment of the present invention. FIG. 13 is a flowchart illustrating an operation of the image blur correction microcomputer according to the second embodiment of the present invention. FIG. 14 is a flowchart illustrating an operation of the image blur correction microcomputer according to the third embodiment of the present invention . [Description of Signs] CMR Camera Main Unit LNS Lens CCPU Microcomputer In Camera ICPU Image Correction Microcomputer LCPU Microcomputer In Lens AD Angular Displacement Meter GR Angular Velocity SNS Focus Detection Sensor SDR Drive Circuit IACT Image Shake Correction Actuator ENCZ Zoom Position Detection Encoder ENCB Focus lens position detection encoder ZMTR Zoom drive motor FMTR Focus drive motor STR Shutter

Continuation of the front page (56) References JP-A-5-66450 (JP, A) JP-A-4-20941 (JP, A) JP-A-4-21831 (JP, A) JP-A-4-170528 (JP) JP-A-62-47013 (JP, A) JP-A-3-222585 (JP, A) JP-A-5-173219 (JP, A) JP-A-5-204014 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 5/00

Claims (1)

(57) Claims 1. An imaging optical system having at least one of a zooming optical group and a focusing optical group, and a position of the optical group of the imaging optical system is detected. position detecting means for, said position detecting
Setting to set the image blur correction coefficient according to the output state of the output means.
Determining means, an image blur correction optical mechanism for eccentrically or tilting the optical axis of the imaging optical system, a vibration detecting means for detecting vibration applied to the imaging optical system, an output of the vibration detecting means,
Based on the image blur correction coefficient set by the setting means drives the image blur correction optical system, comprising an image shake correction apparatus provided with an image blur correction unit performs image blur correction, the formation
Multiple discretes depending on the position of the optical group of the image optical system
Storage means for storing a typical image blur correction coefficient, and the storage means
The first image blur correction coefficient and the first image blur correction
The third image between the positive coefficient and the adjacent second image blur correction coefficient
The shake correction coefficient is calculated by performing a predetermined calculation.
A calculating circuit, wherein the setting unit sets the image blur correction coefficient to the first image blur.
When shifting from the correction coefficient to the second image blur correction coefficient
Is the third image shake calculated by the calculation circuit
An image blur correction apparatus , wherein a correction coefficient is set as the image blur correction coefficient .